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Voltage across a magnitude?

  1. Feb 23, 2013 #1
    "Voltage across" a magnitude?

    If a problem says to find the "voltage across" a resistor, is that always a magnitude?
     
  2. jcsd
  3. Feb 23, 2013 #2

    rock.freak667

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    Re: "Voltage across" a magnitude?

    I may be wrong here but from what I remember from school,

    in DC circuits, voltage is scalar.

    in AC circuits, the voltage will have an associated phase angle with it.
     
  4. Feb 23, 2013 #3

    rude man

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    Re: "Voltage across" a magnitude?

    There is polarity associated with that voltage.
     
  5. Feb 23, 2013 #4

    phinds

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    Re: "Voltage across" a magnitude?

    It is a signed magnitude.
     
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